Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?

I upgraded to the latest version, the first using Gtk4

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

Viewed a PDF

   * What was the outcome of this action?

The main windows rendered the PDF, but an empty icon was displayed in place of
the thumbnail.

   * What outcome did you expect instead?

A thumbnail of the page should have been displayed, just like in the previous
version.

*** End of the template - remove these template lines ***

I can confirm this problem in version 49~alpha-2, it is a recent regression that
only started occurring after an apt-upgrade.

(Between this and the scroll wheel zoom issue, this alpha seems to have quite a
few problems -- I am somewhat surprised to see that an alpha version has been
propagated all the way to testing.)

Kind regards,
Ralf

I think most people would be better off using papers instead of evince.

But the thumbnail issue might be more because of the apparmor profile
than the gtk4 update. See https://bugs.debian.org/1127935

Thank you,
Jeremy Bícha